Fetal Cardiology Program Fetal Therapy

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Boston Children's has established itself as one of the preeminent hospitals in the world for fetal heart surgeries, which are procedures to correct a baby's heart defect while still in their mother's womb.

When is fetal therapy the best option?

Recent advances in methods of prenatal diagnosis and ultrasound-guided surgical and catheterization techniques have made fetal therapy possible. Most cardiovascular defects are best treated after a baby is born. However, for a select group of heart defects, in utero therapy may be an option.

Fetal therapy is performed to improve or correct problems that would be too advanced to correct after birth.

Types of defects that may require fetal therapy

The Fetal Cardiology Program at Boston Children's treats both fetal heart rhythm problems and structural heart defects:

  • Fetal heart rhythm problems
    Fetal heart rhythm problems (arrhythmias) respond well to therapy while still in utero. Our fetal cardiologists (echocardiographers  and electrophysiologists) work together to monitor and treat potentially life threatening fetal arrhythmias.
  • Examples of fetal heart rhythm problems may include:
    • Supraventricular Tachycardia (SVT) — the most common serious fetal arrhythmia
    • Atrial flutter
  • Structural heart defects
    Fetal therapy may be an option for a select group of structural heart defects. Examples of these defects include:
  • Aortic stenosis: This is a thickening and narrowing of the aortic valve of the heart that obstructs the outflow of blood from the left ventricle. The severe form of aortic stenosis can lead to significant damage to the left ventricle and a serious defect called Hypoplastic Left Heart Syndrome.
  • Pulmonary atresia: This is a malformation of the pulmonary valve that obstructs the outflow of blood from the right ventricle to the lungs. This can lead to underdevelopment of the right ventricle.
  • Hypoplastic Left Heart Syndrome with a restrictive atrial communication: This is an underdevelopment of the left ventricle of the heart that results in inadequate blood flow throughout the body. These babies need a hole between the upper chambers (atria) of the heart to allow blood to exit the lungs. If there is no hole or a small hole between the upper chambers these babies can become severely ill.

What happens if my baby is a candidate for a fetal intervention/surgery?

If your obstetrician or cardiologist thinks your baby's heart defect may benefit from a fetal intervention you should call the Advanced Fetal Care Center at Boston Children's (617-355-3896). The AFCC will put you in touch with one of our cardiologists who will evaluate your situation. The cardiologist will speak to your obstetrician and cardiologist and, if possible, review your ultrasound study to determine if your baby is a candidate for a fetal intervention.

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This department is currently not accepting appointment requests online. Please call us at: 617-355-6000. International +1-617-355-6000.

This department is currently not accepting appointment requests online. Please call us at: 617-355-6000. International +1-617-355-6000.

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The future of pediatrics will be forged by thinking differently, breaking paradigms and joining together in a shared vision of tackling the toughest challenges before us.”
- Sandra L. Fenwick, President and CEO
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